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<p>To ensure the accuracy of monitoring results, regular calibration of radioactive aerosol monitors is required. In this paper, a preparation device for radioactive aerosol membrane filter sources was developed based on the sampling system of radioactive aerosol monitors. Using this device, <sup>137</sup>Cs aerosol membrane filter sources with different activities were prepared. The activity values of these membrane filter sources were determined using HPGe γ spectrometer, with the prepared sources exhibiting activity levels ranging from 51.7 to 3259&#xa0;Bq and the uncertainties all below 3.3%. According to the national standard verification regulation of China, the uniformity of these membrane filter sources was within 10%, and the repeatability was within 3%. The method is simple to operate, and the performance of the prepared <sup>137</sup>Cs aerosol membrane filter standard sources meet operational requirements.</p>

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Preparation of 137Cs aerosol membrane filter standard source

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月29日

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  • Junda Yi,
  • Weizhe Li,
  • Yuxuan Zhang,
  • Xilin Chen,
  • Guoxiu Qin,
  • Xin Zhou

摘要

To ensure the accuracy of monitoring results, regular calibration of radioactive aerosol monitors is required. In this paper, a preparation device for radioactive aerosol membrane filter sources was developed based on the sampling system of radioactive aerosol monitors. Using this device, 137Cs aerosol membrane filter sources with different activities were prepared. The activity values of these membrane filter sources were determined using HPGe γ spectrometer, with the prepared sources exhibiting activity levels ranging from 51.7 to 3259 Bq and the uncertainties all below 3.3%. According to the national standard verification regulation of China, the uniformity of these membrane filter sources was within 10%, and the repeatability was within 3%. The method is simple to operate, and the performance of the prepared 137Cs aerosol membrane filter standard sources meet operational requirements.